Special NTB Yokohama A540's on 95 S6 Quattro

I was wondering if anyone knows about the special yoko's made for NTB. The Model number on them is A540, so I'm wondering how similar they are to the A520's. The size I am looking at is 225/50/16 with a V speed rating. I wonder if they will be noisie like the 520's, and perform well?